How do I Calculate Echo Z-Scores?

There are currently two options for calculating the Z-scores for common echo measurements using the PHN models: (1) with a table listing the exponential power to be used with body surface area (BSA), the mean value of the indexed measurement, and the standard deviation (SD) of the indexed measurement; or (2) with an online Z-score calculator.

Calculating echo z-scores using the table of exponential power for BSA, mean, and SD:From the table below, one would take the values listed for the parameter of interest and use them along with the measurement value of the parameter and the BSA in the following formula to calculate the Z-score:

Calculating echo z-scores using an online calculator:The results from the PHN Echo Z-Score Project are available as a Z-score calculator on the ParameterZ website using the following link: http://www.parameterz.com/refs/lopez-circimaging-2017. In the future, the PHN website will have a Z-score calculator that can be easily accessed.